678748 has 18 divisors (see below), whose sum is σ = 1382136. Its totient is φ = 290808.

The previous prime is 678739. The next prime is 678749. The reversal of 678748 is 847876.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 678748.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1536 + ... + 1927.

2⁶⁷⁸⁷⁴⁸ is an apocalyptic number.

It is an amenable number.

678748 is an abundant number, since it is smaller than the sum of its proper divisors (703388).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

678748 is a wasteful number, since it uses less digits than its factorization.

678748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3481 (or 3472 counting only the distinct ones).

The product of its digits is 75264, while the sum is 40.

The square root of 678748 is about 823.8616388691. The cubic root of 678748 is about 87.8825913582.

The spelling of 678748 in words is "six hundred seventy-eight thousand, seven hundred forty-eight".